Medical infusion device opened in pressing mode

Abstract

The utility model belongs to the field of medical instruments, and relates to a medical infusion device opened in a pressing mode, which solves the problem of how to improve the quality of the medical infusion device, especially how to improve the quality of the medical infusion device after long-term storage, and comprises a pressed liquid storage device for keeping pressed liquid, a micropump for pressurizing the pressed liquid, a liquid medicine storage device for outputting liquid medicine by utilizing the pressure of the pressed liquid, and a trigger button, a flow channel is formed in the trigger button, the two ends of the flow channel are provided with a first end and a second end which are used for being in butt joint with the liquid pressing storage device and the micropump respectively, and the first end and the liquid pressing storage device are not communicated before the trigger button is pressed. And the second end is not communicated with the micropump before the trigger button is pressed. Bubbles are intercepted in the pumping process, and the influence of the bubbles generated after long-term storage on the pumping precision is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to medical instrument technical field relates to a kind of medical infusion device of pressing type opening. BACKGROUND

[0002] Hydraulic infusion system is a kind of based on volumetric micropump from pressure liquid reservoir, pumping into the pressure cavity of liquid reservoir, to push the drug liquid in liquid reservoir output.

[0003] Pressure liquid reservoir and volumetric micropump are generally directly connected, such as Chinese patent "CN118697979A".But it is easy to make the bubble of pressure liquid reservoir (mainly liquid bag) due to long-term storage and other factors into volumetric micropump, affect pumping precision.Chinese patent "CN118846295A", "CN118416336A" is committed to solving bubble problem.

[0004] Such infusion device, when using, there are usually the following problems.

[0005] Liquid path switch controls liquid bag and micropump module communication problem: in background technique, micropump inlet and liquid bag are usually connected and sealed by glue.The method has the problems of easy water leakage, possible toxicity of glue material and easy cracking of glue at high and low temperature storage, etc.

[0006] Liquid bag assembly sealing storage problem: in background technique, liquid bag needs to be connected with liquid path switch through a section of pipeline, and the connecting pipeline needs to be connected and sealed by glue.The method has the problems of complicated operation, small liquid bag filling amount, high filling process requirement, difficult liquid bag separate sealing preservation, etc.

[0007] Liquid bag long-term storage problem: in background technique, liquid bag long-term storage, freezing and temperature recovery, hydraulic liquid in liquid bag is easy to bubble, bubble is easy to be sucked into micropump inside after micropump module starts, affect pumping precision problem. UTILITY MODEL CONTENTS

[0008] The utility model aims at providing a kind of medical infusion device of pressing type opening, solve how to improve medical infusion device quality especially the problem of quality decline after long-term storage.

[0009] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0010] The utility model provides a kind of medical infusion device of press type opening, including the pressure liquid reservoir of keeping pressure liquid, the micropump of pressure liquid pressurization, the pressure liquid reservoir is outputted with the pressure of pressure liquid, including trigger button, flow channel is provided in the trigger button, and the flow channel both ends have respectively the first end and the second end for docking the pressure liquid reservoir and the micropump, the first end is not communicated before pressing the trigger button with the pressure liquid reservoir, the second end is not communicated before pressing the trigger button with the micropump.

[0011] Preferably, the first end and / or the second end are provided with a needle I or a rubber plug II, and the pressure liquid reservoir outlet and the micropump inlet are provided with a rubber plug I for receiving the needle I or a needle II for piercing the rubber plug II.

[0012] Further, the pressure liquid reservoir is made of a flexible film material by hot pressing, and the rubber plug of the pressure liquid reservoir outlet is arranged in a sealing fixing member, and the sealing fixing member is heat sealed with the film material.

[0013] Further, the pressure liquid reservoir is made in one of the following three ways: a single piece of film material is folded and hot pressed at the edge, an opening of a barrel-shaped film material is hot pressed, and two pieces of film material are attached and hot pressed at the edge.

[0014] Further, the needle I in the trigger button is curved, so that a larger pushing surface is provided when the trigger button is pressed.

[0015] Preferably, at least one of the flow paths from the pressure liquid reservoir outlet to the micropump inlet is provided with a filter membrane that can transmit water but not bubbles.

[0016] Further, the filter membrane is arranged in the flow channel.

[0017] Further, the pressure liquid reservoir outlet and / or the micropump inlet are provided with the filter membrane.

[0018] Preferably, a retreat prevention mechanism is included, which acts on the trigger button to prevent it from being pressed and then returned.

[0019] Further, the retreat prevention mechanism includes a barb arranged on the trigger button and two embedding grooves arranged on the trigger button side block and distributed in the direction of the trigger button.

[0020] Compared with the prior art, the utility model has the following advantages due to the above technical solutions:

[0021] The utility model discloses a press type opening's medical infusion device, because trigger button is separated with the liquid outlet of pressure liquid storage, micro -pump liquid inlet before being pressed, press trigger button, and pressure liquid storage, trigger button, micro -pump can be communicated to, and when the bubble of pressure liquid storage is long -term storage, the bubble is not easy to pass through the flow passage in trigger button, makes the bubble not enter micro -pump, reduces the influence to micro -pump pump quality. BRIEF DESCRIPTION OF DRAWINGS

[0022] Some specific embodiments of the utility model will be described in detail hereinafter with reference to the drawings in an exemplary but not restrictive manner. Identical reference signs in the drawings denote identical or similar components or parts. It should be understood by those skilled in the art that the drawings are not necessarily drawn to scale. In the drawings:

[0023] Figure 1 is the structure schematic diagram of the preferred embodiment of the utility model;

[0024] Figure 2 is Figure 1 the enlarged view of A in

[0025] Figure 3 is Figure 1 the structure schematic diagram of trigger button in

[0026] Figure 4 is the structure schematic diagram after pressing trigger button, and the structure schematic diagram of Figure 2 ;

[0027] Figure 5 is a sectional view of trigger button in the top view direction;

[0028] Figure 6 is Figure 5 the enlarged view of B in

[0029] Figure 7 is the pressure liquid storage structure in other implementation manners, and the display liquid bag is formed by barrel-shaped film material hot pressing;

[0030] Figure 8 is the pressure liquid storage structure in other implementation manners, and the filter membrane is arranged at the display liquid bag outlet;

[0031] In the drawings, the reference signs are explained as follows:

[0032] 1, pressure liquid storage;11, liquid bag;2, micro -pump;3, liquid storage;31, pressure cavity;32, piston;33, liquid cavity;34, medicine outlet;4, trigger button;41, flow passage;42, first end;43, second end;51, filter membrane I;52, filter membrane II;53, filter membrane III;61, rubber plug I;62, rubber plug II;71, thorn I;72, thorn II;8, sealing fixing part;9, anti -back mechanism;91, barb;92, slot;10, stop block. Detailed Implementation

[0033] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] like Figure 1 As shown, the push-to-open medical infusion device mainly includes a pressure reservoir 1, a micropump 2, and a drug reservoir 3. The micropump 2 is a positive displacement pump or other mechanism capable of pumping liquids.

[0035] The micro pump 2 draws in hydraulic fluid from the pressure reservoir 1 and pumps it into the pressure chamber 31 of the medicine reservoir 3. The increased pressure of the hydraulic fluid pushes the piston 32 down, causing the medicine in the medicine chamber 33 to be output from the medicine outlet 34.

[0036] The pressurized liquid reservoir 1 includes a liquid bag 11. The liquid bag 11 is formed by folding a flexible membrane material and then hot-pressing the edges. It is easy to shape, thus making efficient use of space.

[0037] The outlet at the top of the liquid bag 11 is combined with a sealing fastener 8 by heat sealing. The heat sealing method avoids the use of glue, which is more environmentally friendly and less prone to leakage after long-term storage.

[0038] like Figure 2 A rubber plug I61 is provided in the sealing fastener 8.

[0039] like Figure 1 and Figure 2 The inlet of the micro pump 2 (volume pump) is equipped with a needle II 72, and a filter membrane II 52 is provided at the rear end of the needle II 72. The filter membrane II 52 is permeable to water but not to air bubbles.

[0040] like Figure 3 The trigger button 4 has a flow channel 41 inside. The two ends of the flow channel 41 are a first end 42 and a second end 43. The first end 42 houses a piercing needle I 71. The piercing needle I 71 is a hollow metal tube that extends and bends within the trigger button 4. The second end 43 houses a rubber stopper II 62. A filter membrane I 51 is transversely disposed within the flow channel 41. This filter membrane I 51 is permeable to water but impermeable to air bubbles. The piercing needle I 71 protrudes from the first end 42, with a pointed tip, used to pierce the rubber stopper I 61 in the sealing fastener 8. (See [reference]). Figure 2 .

[0041] The trigger button 4 has a large pressing head on the right end, which is easy for a person to touch and press. Before using the medical infusion device, the person presses the trigger button 4 to move the trigger button 4 to the left.

[0042] likeFigure 4 As shown, the trigger button 4 is pressed left. The sharp of the bent needle 71 in the trigger button 4 pierces the rubber plug 61 in the sealing fixture 8, making the trigger button 4 communicate with the liquid bag 11. At the same time, the needle 72 on the micropump 2 pierces the rubber plug 62 on the trigger button 4, making the trigger button 4 communicate with the micropump 2. At this time, the micropump 2 can be started to pump.

[0043] If there are air bubbles in the liquid bag 11 due to long-term storage, they will be intercepted by the filter membrane 51 in the trigger button 4 and the filter membrane 52 in the micropump 2, so as not to affect the pumping accuracy. The number of filter membranes is not limited, and two or more filter membranes have better effect. The position of the filter membrane is not limited, and it can be arranged in the flow path from the liquid storage reservoir 1 outlet to the micropump 2 inlet. In this example, two filter membranes are arranged in the flow channel 41 in the trigger button 4 and the micropump 2 inlet, and a filter membrane 53 can also be arranged in the sealing fixture 8 at the outlet of the liquid bag 11 as shown. Figure 8

[0044] As shown in the top view, after the trigger button 4 is pushed to the left, the trigger button 4 is prevented from returning to the right by the anti-return mechanism 9, ensuring the smooth progress of the pumping process. Figure 5 Figure 6 As shown in the top view, after the trigger button 4 is pushed to the left, the trigger button 4 is prevented from returning to the right by the anti-return mechanism 9, ensuring the smooth progress of the pumping process.

[0045] The anti-return mechanism 9 includes a barb 91 and two embedding grooves 92. The barb 91 is arranged on the side of the trigger button 4, and the embedding grooves 92 are arranged on the side block 10. The block 10 is integrated on the sealing fixture 8 (see Figure 2 ). The embedding grooves 92 are two and distributed in the direction of travel of the trigger button 4. Initially, the barb 91 is located in the right embedding groove 92, and after the trigger button 4 is pressed, the barb 91 is located in the left embedding groove 92.

[0046] In this example, the liquid bag 11 is folded by the film material and then heat-pressed on the edges. The liquid bag 11 can also be formed by heat-pressing the open edge of the barrel-shaped film material, as shown in Figure 7 Figure 8

[0047] As described above, due to the arrangement of the trigger button 4, the medical infusion device is not connected between the liquid storage reservoir 1 and the micropump 2 before use. The liquid bag 11 in the liquid storage reservoir 1 is sealed by heat sealing, without using glue, which is not easy to leak water, more environmentally friendly, and avoids the possibility of cracking during high and low temperature storage. And the filter membrane can pass through the liquid, not through the air bubbles generated by the long-term storage of the liquid bag 11, so as to avoid affecting the pumping accuracy of the micropump 2.

[0048] ​​​​The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A medical infusion device of press-to-open type, comprising a pressurized liquid reservoir (1) for holding pressurized liquid, a micro pump (2) for pressurizing the pressurized liquid, and a drug liquid reservoir (3) for outputting drug liquid by using the pressure of the pressurized liquid, characterized in that, The trigger button (4) is provided with a flow channel (41), and the flow channel (41) has a first end (42) and a second end (43) for respectively connecting the liquid pressure reservoir (1) and the micro pump (2), the first end (42) is not communicated with the liquid pressure reservoir (1) before the trigger button (4) is pressed, and the second end (43) is not communicated with the micro pump (2) before the trigger button (4) is pressed.

2. The press-to-open medical infusion device of claim 1, wherein: The first end (42) and / or the second end (43) is provided with a needle I (71) or a rubber plug II (62), and the output of the liquid pressure reservoir (1) and the input of the micro pump (2) are provided with a rubber plug I (61) for receiving the needle I (71) or a needle II (72) for piercing the rubber plug II (62).

3. The press-to-open medical infusion device of claim 2, wherein: The liquid pressure reservoir (1) is made of a flexible film material by hot pressing, and the rubber plug (6) of the output of the liquid pressure reservoir (1) is arranged in a sealing fixing member (8) which is heat sealed with the film material.

4. The press-to-open medical infusion device of claim 3, wherein: The liquid pressure reservoir (1) is made by one of the following ways: single piece of film material is folded and hot pressed at the edge, the opening of barrel-shaped film material is hot pressed, and two pieces of film material are attached and hot pressed at the edge.

5. The press-to-open medical infusion device of claim 2, wherein: The needle I (71) in the trigger button (4) is curved, so that it has a larger pushing surface when the trigger button (4) is pressed.

6. The press-to-open medical infusion device of claim 1, wherein: At least one of the flow paths from the output of the liquid pressure reservoir (1) to the input of the micro pump (2) is provided with a filter membrane (51, 52, 53) which can permeate water but not bubbles.

7. The press-to-open medical infusion device of claim 6, wherein: The filter membrane (51, 52, 53) is arranged in the flow channel (41).

8. The press-to-open medical infusion device of claim 6, wherein: The output of the liquid pressure reservoir (1) and / or the input of the micro pump (2) is provided with the filter membrane (51, 52, 53).

9. The press-to-open medical infusion device of claim 1, wherein: The anti-back mechanism (9) acts on the trigger button (4) to make the trigger button (4) unable to retreat after being pressed.

10. The press-to-open medical infusion device of claim 9, wherein: The anti-back mechanism (9) includes a barb (91) arranged on the trigger button (4) and two embedding grooves (92) arranged on the side block (10) of the trigger button (4) and distributed in the direction of the trigger button (4).

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